My concern is the black rings. Are these like the other algae, but small dot like algae that you can scrape off. You might have black algae, which is...

There are a few tricks you can try.

One is leaving your vacuum in the pool overnight sucking from the bottom of the pool. Another that may work is...

great advice but can i use bleach to get the clorine up to 20ppm and how much do i need for a 13000 gl pool

I just opened my pool this weekend, and total alk was down, by about 50 lbs of bicarb. The pool supply store did the analysis for free, but the...

Keep the chlorine high and run the filter non stop. Add some clarifier if you like to speed the process up, and have the water re-balanced properly....

Can you post the following results from your pool:

Cyanuric acid

Your exact pH

Free Chlorine

Total Chlorine/Combined Chlorine

Generally speaking you can add the chlorine within say 20 minutes of making a pH adjustment. Retest the pH every 4 hours and retreat as required. The...

It would be helpful if you told us, your pool chemistry levels, how long you run your equipment for and whether the algae is growing on the sunny or...

1 quart of chemical for green algae.

Maybe you can show us the label of the chemical.

You can use anti-foam to destroy foam or use...

If your pool water looks cloudy, it indicates a bad water balance (too much metal ion?). Make sure that your filter works well and use flocculant to...

Hi,

I had the same problem last year, when the chlorine would keep disappearing. If the pool walls feel a little slimy, even though there is no sign...

the white spots are what's known as "calcium bleed" calcium hardness is part of pool water chemistry balancing. when water evaporates and...

Is it free chlorine or combined chlorine you're measuring? If it is off the charts, you can dilute your sample water by mixing it 50/50 with...

hi all,

I'm a little confused as to the order of things when it comes to pool chemicals.

Currently my 20000gal gunite pool is very very green and...